<!DOCTYPE html>
<html style="width: 1px">
<head>
<script>

function boom()
{
  document.documentElement.offsetHeight;
  var x = document.getElementById("x").firstChild;
  x.data = "a" + x.data;
}

</script>
</head>

<body onload="boom();"><span id="x">
&#x202a;&#x10871;</span></body>
</html>
